Ejector for firearms.



L. H. COBB. EJEQTOB, FOR PIREARMS. APPLIOATION FILED MAY 29, 1909.

Patented Aug. 1, 1911.

FlQE.

LYMAN' I-I. COBB, OF FITCI-IBURG, MASSACHUSETTS, ASSIGNOR T0 MARYELIZABETH JOHNSON, TRUSTEE, OF FITCl-IBURG, MASSACHUSETTS.

EJECTOR FOR FIREARMS.

Specification of Letters Patent.

Application filed May 29, 1909.

To all @07mm it may concern:

lie it known that l, LYMAN H. COBB, a citizen of the United States,residing at Fitchburg', in the county of ,Worcester and Commonwealth ofMassachusetts, have invented a new and useful improvement in Ejec-torsfor Firearms, of which the following a specification, accompanied bydrawings forming a part of the same, in which- Figure 1 represents aside View of a pistol embodying an ejector mechanism containing mypresent invention, a portion of the frame having been broken away todisclose the ejector cam. Fig. 2 represents a side view of a portion ofa pistol, showing the ejector plateasmoved away from the cylinder in theoperation of withdrawing a cartridge. Fig. 3 is the same view as shownin Fig. 2, but with the ejector plate returned to its normal position.Fig. 4 is a side view of a portion of a pistol with thc cylinder incentral sectional view, and showing the cartridge eject-- ing mechanismat the point of release of the ejector plate, and Fig. 5 is an enlargedview of the ejector cam partly shown in section.

Similar reference letters and figures refer to similar parts in thedifferent Views.

My present invention relates to an improvement in the cartridgeeject-ing mechanism of a break-down firearm and my invention isillustrated in the accompanying drawings as embodied in a revolver.

It relates particularly to that partof the mechanism which is lrnown asthe ejector cam, and it consists in t-he employment of a spring actuatedplunger' carried by the ejector cam and applied to the pivotal pin uponwhich the cam rocks, for the purpose of restoring the cam to its normalposition, in which the cam shoulder will engage the frame of the firearmas the latter is broken down.

Referring to the accompanying drawings, 1 denotes the frame of a pistoland 2 the barrel pivoted upon the frame by a pivotal pin 3 in the usualmanner in firearms of this class.

4 is a rotatable cartridge cylinder having cartridge chambers which aresuccessively brought into alinement with the breech 5 of the barrel, inposition to be discharged by the hammer 6. The cylinder 4 rotates upon ahollow sleeve 7 containing a sliding ejector rod S, provided at one endWith a notched ejector plate 9 which normally rests in a recess 10 inthe end of the cylinder, and engages the flanged heads of the eartridgesas they are held in the chambers 11 of the cylinder. A spiral spring 12is applied between the cylinder and a shoulder 13 of the ejector rod tohold the ejector plate 9 in the recess 10. The opposite end of theejector rod 8 rests against a projecting tooth 14 upon a rocking ejectorcam 15 held upon, the pivotal pin 3, which passes through an elongatedopening 16 in the cam in order to allow a slight sliding movement of thecam upon the pivotal pin 3.

lDressing against the pivotal pin 3 is a plunger 17 having a stem 1Sprovided with a head 19, which prevents the plunger from falling outwhen the cam is removed. The cam is provided with a chamber 20 toreceive the plunger 17 and also with a radial hole litting the stem 1S,and is counterbored upon the outside of the cam to receive the head 19.Between the outer wall of the chamber 20 and the plunger 17 is a spring21, which incloses the stem 18 and presses the plunger 17 against thepivotal pin 3. The cam 15 is provided with an eccentric cam surface 22and also with a radial shoulder rllhe barrel is provided with aprojection 24 which, as the barrel is rocked on the pivotal pin 3,slides over the cam surface 22 and slides the cam on the pivotal pin 3from the position shown in Fig. 1 to that shown in Fig. 4.

During the rocking movement of the barrel about the pivotal pin 3, thecam 15 is held from rotating by the contact of the shoulder 3 with theframe 1 of the firearm, as shown in Fig. 2, and the pressure of thetooth 14 against the ejector rod 8 forces the ejector plate 9 out of therecess 10 of the cylinder against the tension of the spiral spring 12.As the projection 24 approaches the shoulder' 23, it moves over the camsurface 22 and slides the cam 15 laterally on the pivotal pin 3 againstthe tension of the spring 21, until the shoulder 23 is released from theframe 1, thereby allowing the cam 15 to rotate, when the tension of thespring 12 ret-urns the ejector plate 9 to the recess 10 of the cylinder,bringing the parts into the position shown in Fig. 3. In Fig. 2 the cam15 is shown as held from rotation by the contact of its shoulder 23 withthe frame of the firearm. In Fig. 4 the shoulder 23 is represented asjust being released from engagement with the trame 1 and in Fig. 3 theejector rod 8 and ejector plate 9 are represented as having beenreturned to their normal position by the ejector spring 12 rotating thecam 15.

I am aware that an ejector rod and plate actuated by a toothed cam inwithdrawing a cartridge shell Jfrom the cylinder, and returned by thetension of a spiral spring, are not new. One of the diiiicultiesattending the use of an ejector mechanism of this class has been tocontrol the lateral sliding movement of the ejector cam 15 upon thepivotal pin 3. Wlhen the barrel is returned from the position shown inFig. 3 to that shown in Fig. 1, the contact of the projection 24 againstthe back side of the tooth 141 reverses the movement of the cam 15 andbrings the shoulder 23 outside the frame, but/ unless the spring 21 iscertain in its action, the shoulder 23 is not moved downward intoposition to engage the frame when the firearm is again broken down. Itis the object of my invention to control the movement of the cam so asto render its action certain in ejecting the cartridges. l accomplishthis object by providing the cam 15 with a radial chamber 2O containingthe spring 21 and plunger 17, as above described. 1When the barrel hasbeen restored to its normal position in the frame, as shown in Fig. 1,the shoulder 23 will have been been brought outside the end of the frameby the contact of the projection 241 with the tooth 14. As soon as thisoccurs,` the tension of the spring 21 acting against the plunger 17,which rests against the pivotal pin 3, will force the cam 15 laterallyin the direction of the arrow 25, Fig. 1, thereby moving the shoulder 23radially outward in position to contact with the end of the frame andhold the cam 15 from rotation as the pistol isI again broken down.

I claim,

1. In a cartridge ejector mechanism, an ejector cam capable of a slightlateral movement on a pivotal pin, a plunger having a head carried in achamber in said cam and pressing against said pivotal pin, a stem forsaid plunger inclosed in a radial hole in said cam, and a spiral springinclosing said stem and between the outer wall ot said chamber and thehead of said plunger.

2. In a cartridge ejector mechanism, an ejector cam capable of a slightlateral movement on a pivotal pin, a plunger having a head carried in achamber in said cam and pressing against said pivotal pin, a steminclosed in a radial hole in said cam'and a second head in acounterbored recess in said cam outside of said radial hole, and aspiral spring inclosing said stem and between the outer wall of saidchamber and the head ot said plunger.

3. A rocking cam for a cartridge ejector mechanism capable of a slightsliding movement on a pivotal pin, means for moving said cam in onedirection, comprising a plunger 17 held in a chamber 20 in said cam andin contact with said pin, a stem 18 for said plunger passing throughsaid chamber 2O and through a radial hole in the outer wall of saidchamber and provided with a head 19, and a spring 21 inclosing said stem18 between the outer wall of said chamber 2O and said plunger 17.

Dated this 25th day of May 1909.

LYMAN H. COBB.

Witnesses:

RALPH H. FALEs, ARTHUR H. BROWN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

